Wabner



(No Model.)

J. 0. WARNER.

ELECTRIC ANNUNGIATOR DROP. No. 477,616. Patented June 21, 1892 L /Z EZ: E5555 2; Man 2472? bi/ifififi Lila/airmen J n l 9 m WK? faring-y:

25 local circuitsofseveral shutters UNITED STATES PATENT OF IC JAMES C. WARNER, OF CHICAGO, ILLINOIS, ASSIGNOR. TO THE WESTERN ELECTRIC COMPANY, OF SAME PLACE.

ELECTRlC-ANNUNCIATOR DROP.

srnomrcs'rron forming part of Letters Patent No. 477,816, dated June 21, 1892.

Application filed Juno 1?, 1889.

To all whom it may concern.-

- lsc it; known that I, JAMES C.- WARNER, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illi- 5 nois, have invented a certain new and useful Improvement in Electric-Annunciator Drops, (Case No. 3,) of which the following is a full, clear, concise, and exact description, referencc'hoing had to the accompanying drawxo ings, forming a part of this specification.

. My invention 'relates to electric annun'ciators of the class usuallycmployed as individual signaling devices in telephone-exchange systems; and its ohjects are, first, toprovide r 5 a soft-iron shield about the coil, so as to prevent as far as possible inductive effects between the coils of thedifferent magnets when placed near each other; second, to provide for moving the hook which holds the shutter forward slightly at the same time the hook is lifted, so as to make the action of the annunciator more delicate or sensitive; third, to ;,.l0Vid6 a special wire independent of the .hecl-plato as a common return-wire for the or a. group of s1mtters; fonrth, to make the different electro-magnets, together with their armatures, readily removable, and, fifth, to provideior I carrying out the ends of the wires of the coil of each an'nunciator to separate connectingpleces atthe rear-,- so that they may be readily accessible. a

with these objects in view my invention, consists, first, in providing a soft-iron cylindcr about the coil of. each magnet; second, inv mounting the hook which. extends fo' ard from the armature at a point below the axis or pivotal support of said armature, so that the hook will be moved forward slightly when 4c. the armature is attracted; third, in mounting a wire upon the iron plate in position to be inthc path of the local contact-spring of the ,anmmciatorwhen the same is forced backward 'by the falling of the shutter; fourth, in

eslhevma'nner ofmounting the annu'nciators upon'th'c supporting-plate, and, fifth, in proriding an opening or openings in the armature and an insulated support-at the rear of the same, upon which are mounted connect- 5e ing-pieccs, the different ends of the coil be- Rwie No. 314,811- (Ro model.)

' ing carried back to said connecting-pieces to it make the connections readily accessible at the roar.

My invent on will be readily understood by re: renco to the accompanying drawings, in which- Figure 1 is a plan view of an annunciator embodying my improvements. Fig. 2 is avertical longitudinal central sectional view thereof. Fig. 3 is a front elevation thereof. Fig. 4 is a rear elevation as seen from line a: m of Fig. 2.

Like parts are indicated by similar letters of reference throughout the different figures.

The armature -.lever a extends forward through-a slot provided in the iron plate 11 after the manner described in my patent, No. 266,405, dated October 24, .1882, for electric annunciators, the soft-iron cylinder or shield 41 being cut away, as shown, so'asto give room for this lover or hook.

The armature (Z is pivoted at pivotseahove the rear end of the lever. Thus movement of 'of rubber g, upon which are mounted the connecting-pieces h i. The wires k, forming the terminals or ends of the helix, are cairiod back through the armature d and connected, as shown, respectively, with contact-pieces h and i. In this manner the terminals of the coils are made accessible'at the rear of the annunciator for connection with the circuit into which the annunciator is to beiutroduced. This frame f may be made conveniently of brass. The pivots a may be inserted through the armsof this frame, as shown. The screw Z is inserted from the front through the plate I), and the end of tho soft-iron shield into the core, this single screw serving to hold the electro-mag1fet of the annnnciator in proper position at the rear of the plate, while at the same time. the corois-held in proper relation to the shield. 33: simplyremoving this screw loo any electro-mugnet, together with its armature and lever, maybe taken off for inspection or repair. a I

Upon the front of the plate b and under each annunciatorI mount a wire m, the rubber pieces n being secured to the plate and the wire being supported thereby and insulated from the plate, as shown. When the shuttcrfalls,thelocal-cireuitcloseroisbrought into contact with thewire. m.

Annunciators thus constructed are specially designed to be used in close proximity one to another and are found to be more sensitive and reliable and more convenient for connection of the wires than any heretofore used,

magnetic induction between the cores being prevented by the soft-iron shields which are placed over the different coils.

Having thus described my invention, I claim as new and desire to secure by Letters Paten t- 1 1. The combination, with the coil or helix, of a soft-iron'shield surrounding the same, the armature at the rear of the core of said helix, and the armature-lever extending forward through a slot or opening in the plate I), and the drop with which-said l'ever-isadapbed to he engaged when thedro'p is lifte'd and to be d isengagcd' theref rom, when the arma-- tnre' is attracted, substantially as and for the purpose specified.

2. The combination, with the coil orhelix,

Y of a soft-iron shield surrounding the same,

the armature at the rear of the core of said helix, and the armature-lever secured to the armature below the pivotal support thereof and extending forward through aslot or opening in the plateb, and the drop with which said lever is adapted tobe engaged whenthe drop is lifted and to be disengaged therefrom when the armature is attracted, substantially as and for the purpose specified.

I 3. 'lhecombination, with the soft-iron shield about the helix of an annnnciator, of the frame f, mounted thereon and extending to the rear, the armature pivoted tosaid frame,

and the connecting-pieces mounted thereon.

at the'rear, and the different ends of the wire Y of the helix being connected, respectively, with said connecting-pieces, substantially as and 'for the. purpose specified.

4.- The annn'nciator provided with the armature d, provided with openings, the ends of the wire of the helix being carried back through said openings in said armature and connected with insulated connecting-pieces h '11, respectively, substantially as and for the purpose specified.

In witness whereof I hereunto subscribe my name this 11th day of June, A. I). 1889.

I JAMES C. WARNER.

Witnesses:

ELLA EDLER, GEORGEP. BARTON. 7 

